usage.c: remove reference to busybox.h
*: s/include "busybox.h"/include "libbb.h"

diff --git a/coreutils/hostid.c b/coreutils/hostid.c
index e14f6ca..7d96651 100644
--- a/coreutils/hostid.c
+++ b/coreutils/hostid.c
@@ -9,7 +9,7 @@
 
 /* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
 
-#include "busybox.h"
+#include "libbb.h"
 
 /* This is a NOFORK applet. Be very careful! */